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Minerals - Dioptase | TerraCollect

Mineral - Dioptase

DioptaseCuSiO₃ · H₂O

Chemical Properties

Mineral Class

Silicates

Toxicity

none

Formula

CuSiO₃ · H₂O

Unit Cell

a=14.57 c=7.78 Z=18

Physical Properties

Hardness

5

Streak

greenblueblue green

Optical Properties

Color

green

Birefringence

0.052

Luster

Vitreous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

trigonal

Point Group

Composition

Elements

Mass

SiO₂

38.93

CuO

49.51

H₂O

11.27

Dana 1892

Karten-Ebenen

Geologische KarteSatelliten Karte

Density

Normal (2-3,5)

Cleavage

Perfect after {1011}

Fracture

conchoidal,

uneven

Tenacity

Brittle

rhombohedral - 3

Space Group

R3 (148)

Habit

prismatic, Rhombohedron

Formation

Oxidation zone of Copper deposits

Paragenesis

Twinning

Rarity

Common

Synonyms

Dioptase